CVE-2025-24964: Remote Code Execution when accessing a malicious website while Vitest API server is listening

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-02-04 · updated 2026-06-17
Weakness: CWE-1385

Description

Vitest is a testing framework powered by Vite. Affected versions are subject to arbitrary remote Code Execution when accessing a malicious website while Vitest API server is listening by Cross-site WebSocket hijacking (CSWSH) attacks. When `api` option is enabled (Vitest UI enables it), Vitest starts a WebSocket server. This WebSocket server did not check Origin header and did not have any authorization mechanism and was vulnerable to CSWSH attacks. This WebSocket server has `saveTestFile` API that can edit a test file and `rerun` API that can rerun the tests. An attacker can execute arbitrary code by injecting a code in a test file by the `saveTestFile` API and then running that file by calling the `rerun` API. This vulnerability can result in remote code execution for users that are using Vitest serve API. This issue has been patched in versions 1.6.1, 2.1.9 and 3.0.5. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Affected products

vitest-dev vitest: through 0.0.125; from 1.0.0 before 1.6.1; from 2.0.0 before 2.1.9; from 3.0.0 before 3.0.5 — fixed in 1.6.1, 2.1.9, 3.0.5

How to fix

Upgrade to a fixed version: vitest-dev vitest 1.6.1, 2.1.9, 3.0.5. Check the vendor advisory for mitigations.

References

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